Playfair Cipher 1.not even the large number of keys in a monoalphabetic cipher provides security 2.one approach to improving security was to encrypt multiple letters 3.the Playfair Cipher is an example 4.invented by Charles Wheatstone in 1854,but named after his friend Baron Playfair Playfair Key Matrix 1.a 5X5 matrix of letters based on a keyword 2.fill in letters of keyword (sans duplicates) 3.fill rest of matrix with other letters Encrypting and Decrypting -plaintext is encrypted two letters at a time 1. if a pair is a repeated letter, insert filler like X’ 2. if both letters fall in the same row, replace each with letter to right (wrapping back to start from end) 3. if both letters fall in the same column, replace each with the letter below it (again wrapping to top from bottom) 4. otherwise each letter is replaced by the letter in the same row and in the column of the other letter of the pair
标签： monoalphabetic Playfair provides security
上传时间： 2017-05-25
上传用户：变形金刚
三星程式范例，八位元的 timer, counter, serial I/O, clock switching, power down, key scan, A to D, software generated LCD control, ...
上传时间： 2013-12-17
上传用户：zhengzg
温度传感器用单总线DS18B20，CPU为2051，三个按键，分别为UP，DOWN，SET温度调节上限为125度，下限为-55度。
上传时间： 2013-12-03
上传用户：wlcaption
Uma modelagem de um cenario basico para quem esta aprendendo a usar open/gl na plataforma C++. Utilizando comandos basicos como setas direcionais e teclas especiais como home, end, page up e page down voce pode navegar por todo o ambiente 3D com muita facilidade.
标签： aprendendo plataforma modelagem cenario
上传时间： 2014-12-19
上传用户：ynwbosss
Novell.Press.Linux.Kernel.Development linux内核开发的经典书籍之一 The Linux kernel is one of the most interesting yet least understood open-source projects. It is also a basis for developing new kernel code. That is why Sams is excited to bring you the latest Linux kernel development information from a Novell insider in the second edition of Linux Kernel Development. This authoritative, practical guide will help you better understand the Linux kernel through updated coverage of all the major subsystems, new features associated with Linux 2.6 kernel and insider information on not-yet-released developments. You ll be able to take an in-depth look at Linux kernel from both a theoretical and an applied perspective as you cover a wide range of topics, including algorithms, system call interface, paging strategies and kernel synchronization. Get the top information right from the source in Linux Kernel Development
标签： Linux Development interes Novell
上传时间： 2017-06-06
上传用户：songyue1991
迷宫探险算法，一个CPP文件实现。在TC下编译生成。生成的程序是dos exe。LEFT/UP/RIGHT/DOWN 在迷宫中向左、上、右、下走一步。走过的路线显示为黄色，回头路显示为红色。
上传时间： 2017-06-10
上传用户：
SOME BACKGROUND ON DESIGN PATTERNS The term “design patterns” sounds a bit formal to the uninitiated and can be somewhat off-putting when you first encounter it. But, in fact, design patterns are just convenient ways of reusing object-oriented code between projects and between programmers. The idea behind design patterns is simple-- write down and catalog common interactions between objects that programmers have frequently found useful.
标签： BACKGROUND uninitiate PATTERNS patterns
上传时间： 2013-12-22
上传用户：shizhanincc
本程序采用ACC数据核心构件！！ 功能介绍： 程序代码重新设计与优化，浏览速度可以说是比较一流！ 程序更新设计相对管理目录！让你修改更加方便！ 全站无后台控制的地方我们全用JS调用的方式进行管理，大大降低了您的工作量！ 后台控制封闭管理程式！！ 特点： 更新家族对战管理平台！可以说在发布站界是第一的！ 后台采用HTML生成↓ (可以窗口化浏览生成代码/主要是方便修改与观看错误信息,优化了老发布系统的直接生成) 更多功能请在商业版本程序中体验！ 程序结构： Admin 后台管理核心 Data 数据库存放目录 inc 发布站前台核心文件 index_ad 广告图片存放目录 index_img 前台基本图片存放目录 index_top 前台TOP图片存放目录 top_ad 发布站前台文字广告/图片广告/JS文件存放目录/请自行修改JS代码！ Top_Go 发布站连接导航目录 | | top_Wz.js 顶部文字导航JS文件！需要修改导航请修改JS代码！ 以下文件不懂请勿乱修改
上传时间： 2013-11-28
上传用户：wanqunsheng
Electronics Design Checklist C) 2003 Hank Wallace This is a checklist for electronics designers. The idea is for engineers and technicians to share experiences and create a detailed checklist, which the individual designer can pare down to meet his or her specific needs. There are many details that go into the making of a first-run design success, and this checklist helps prevent Murphy s gremlins from marring an otherwise healthy design.
标签： Electronics electronics Checklist checklist
上传时间： 2017-06-17
上传用户：ddddddos
飞库网 电子书下载，自动过滤广告代码 文件 Down.cfg main.dcu main.ddp main.dfm Down.dof Down.dpr Down.exe main.pas RegEx.pas
标签： 电子书
上传时间： 2017-06-21
上传用户：lindor
